Swimming can keep fit, shape and lose weight, and it is the most suitable exercise for women to lose weight. People swimming in the water, paddling with two arms, kicking with two legs at the same time, and participating in sports with all muscles can promote the whole body muscles to get a good exercise. Especially the pectoralis major, deltoid, triceps brachii and upper body back muscles related to upper limb swing will become more developed. At the same time, swimming is a periodic exercise, paddling and fetching water are alternately tense and relaxed, and long-term exercise makes muscles soft and elastic. Because of this, female swimmers often have plump and firm breasts, elastic muscles, well-proportioned figures and beautiful curves. When swimming, water consumes more energy than land because its density and heat transfer are greater than air. These energy supplies are supplemented by consuming sugar and fat in the body. Regular swimming can gradually remove excess fat from the body without getting fat. Therefore, swimming is one of the effective ways to lose weight.